ntsimulator/src/utils/utils.c

/*
 * utils.c
 *
 *  Created on: Feb 19, 2019
 *      Author: parallels
 */

#include "utils.h"

#include <math.h>
#include <time.h>
#include <sys/time.h>
#include <stdio.h>

void set_curl_common_info_ves(CURL *curl)
{
	struct curl_slist *chunk = NULL;
	chunk = curl_slist_append(chunk, "Content-Type: application/json");
	chunk = curl_slist_append(chunk, "Accept: application/json");

    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, chunk);

    curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 2L); // seconds timeout for a connection
    curl_easy_setopt(curl, CURLOPT_TIMEOUT, 5L); //seconds timeout for an operation

    curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
}

void getCurrentDateAndTime(char *date_and_time)
{
	time_t t = time(NULL);
	struct tm tm = *localtime(&t);
	struct timeval tv;
	int millisec;

	gettimeofday(&tv, NULL);
	millisec = lrint(tv.tv_usec/1000.0); // Round to nearest millisec
	if (millisec>=1000)
	{ // Allow for rounding up to nearest second
		millisec -=1000;
		tv.tv_sec++;
		millisec /= 100;
	}
	sprintf(date_and_time, "%04d-%02d-%02dT%02d:%02d:%02d.%01dZ",
	tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
	tm.tm_hour, tm.tm_min, tm.tm_sec, millisec/100);

	return;
}

void	generateRandomMacAddress(char *mac_address)
{
	long rand1, rand2, rand3, rand4, rand5, rand6;
	rand1 = random_at_most(255);
	rand2 = random_at_most(255);
	rand3 = random_at_most(255);
	rand4 = random_at_most(255);
	rand5 = random_at_most(255);
	rand6 = random_at_most(255);

	sprintf(mac_address, "%02X:%02X:%02X:%02X:%02X:%02X", rand1, rand2, rand3, rand4, rand5, rand6);

	return;
}

long random_at_most(long max) {
  unsigned long
    // max <= RAND_MAX < ULONG_MAX, so this is okay.
    num_bins = (unsigned long) max + 1,
    num_rand = (unsigned long) RAND_MAX + 1,
    bin_size = num_rand / num_bins,
    defect   = num_rand % num_bins;

  long x;
  do {
   x = random();
  }
  // This is carefully written not to overflow
  while (num_rand - defect <= (unsigned long)x);

  // Truncated division is intentional
  return x/bin_size;
}

int getSecondsFromLastQuarterInterval(void)
{
	time_t t = time(NULL);
	time_t t_past = time(NULL);
	struct tm tm = *localtime(&t);
	struct tm tm_15_min_ago = tm;

	//round to the last quarter hour
	tm_15_min_ago.tm_min -= (tm_15_min_ago.tm_min % 15);
	tm_15_min_ago.tm_sec = 0;

	t=mktime(&tm_15_min_ago);
	t_past=mktime(&tm);

	double seconds = difftime(t_past, t);

	return (int)seconds;
}

int getSecondsFromLastDayInterval(void)
{
	time_t t = time(NULL);
	time_t t_past = time(NULL);
	struct tm tm = *localtime(&t);
	struct tm tm_day_ago = tm;

	//round to the last quarter hour
	tm_day_ago.tm_hour = 0;
	tm_day_ago.tm_min = 0;
	tm_day_ago.tm_sec = 0;

	t=mktime(&tm_day_ago);
	t_past=mktime(&tm);

	double seconds = difftime(t_past, t);

	return (int)seconds;
}

void getPreviousQuarterInterval(int number_of_intervals, char *date_and_time)
{
	time_t t = time(NULL);
	t -= 15 * 60 * number_of_intervals;
	struct tm tm = *localtime(&t);

	tm.tm_min -= (tm.tm_min % 15);
	tm.tm_sec = 0;

	sprintf(date_and_time, "%04d-%02d-%02dT%02d:%02d:%02d.0Z",
	tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
	tm.tm_hour, tm.tm_min, tm.tm_sec);

	return;
}

void getPreviousDayPmTimestamp(int number_of_intervals, char *date_and_time)
{
	time_t t = time(NULL);
	t -= 24 * 60 * 60 * number_of_intervals;
	struct tm tm = *localtime(&t);

	tm.tm_hour = 0;
	tm.tm_min = 0;
	tm.tm_sec = 0;

	sprintf(date_and_time, "%04d-%02d-%02dT%02d:%02d:%02d.0Z",
	tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
	tm.tm_hour, tm.tm_min, tm.tm_sec);

	return;
}

long int getMicrosecondsSinceEpoch(void)
{
	time_t t = time(NULL);
	struct tm tm = *localtime(&t);
	struct timeval tv;
	long int useconds;

	gettimeofday(&tv, NULL);
	useconds = t*1000 + tv.tv_usec; //add the microseconds to the seconds

	return useconds;
}

//TODO need to implement other authentication methods as well, not only no-auth
void prepare_ves_message_curl(CURL *curl)
{
	curl_easy_reset(curl);
	set_curl_common_info_ves(curl);

	char *ves_ip = getVesIpFromConfigJson();
	int ves_port = getVesPortFromConfigJson();

	char url[100];
	sprintf(url, "http://%s:%d/eventListener/v7", ves_ip, ves_port);
	curl_easy_setopt(curl, CURLOPT_URL, url);

	free(ves_ip);

//	curl_easy_setopt(curl, CURLOPT_HTTPAUTH, CURLAUTH_ANY);

	return;
}

cJSON*	vesCreateCommonEventHeader(char *domain, char *event_type, char *source_name, int seq_id)
{
	char dateAndTime[50];
	getCurrentDateAndTime(dateAndTime);

	long int useconds = getMicrosecondsSinceEpoch;

	cJSON *commonEventHeader = cJSON_CreateObject();
	if (commonEventHeader == NULL)
	{
		printf("Could not create JSON object: commonEventHeader\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(commonEventHeader, "domain", domain) == NULL)
	{
		printf("Could not create JSON object: domain\n");
		return NULL;
	}

	char eventId[200];
	sprintf(eventId, "%s_%s", source_name, dateAndTime);

	if (cJSON_AddStringToObject(commonEventHeader, "eventId", eventId) == NULL)
	{
		printf("Could not create JSON object: eventId\n");
		return NULL;
	}

	char event_name[200];
	sprintf(event_name, "%s_%s", domain, event_type);

	if (cJSON_AddStringToObject(commonEventHeader, "eventName", event_name) == NULL)
	{
		printf("Could not create JSON object: eventName\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(commonEventHeader, "eventType", event_type) == NULL)
	{
		printf("Could not create JSON object: eventType\n");
		return NULL;
	}

	if (cJSON_AddNumberToObject(commonEventHeader, "sequence", (double)(seq_id)) == NULL)
	{
		printf("Could not create JSON object: sequence\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(commonEventHeader, "priority", "Low") == NULL)
	{
		printf("Could not create JSON object: priority\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(commonEventHeader, "reportingEntityId", "") == NULL)
	{
		printf("Could not create JSON object: reportingEntityId\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(commonEventHeader, "reportingEntityName", source_name) == NULL)
	{
		printf("Could not create JSON object: reportingEntityName\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(commonEventHeader, "sourceId", "") == NULL)
	{
		printf("Could not create JSON object: sourceId\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(commonEventHeader, "sourceName", source_name) == NULL)
	{
		printf("Could not create JSON object: sourceName\n");
		return NULL;
	}

	if (cJSON_AddNumberToObject(commonEventHeader, "startEpochMicrosec", (double)(useconds)) == NULL)
	{
		printf("Could not create JSON object: startEpochMicrosec\n");
		return NULL;
	}

	if (cJSON_AddNumberToObject(commonEventHeader, "lastEpochMicrosec", (double)(useconds)) == NULL)
	{
		printf("Could not create JSON object: lastEpochMicrosec\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(commonEventHeader, "nfNamingCode", "sdn controller") == NULL)
	{
		printf("Could not create JSON object: nfNamingCode\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(commonEventHeader, "nfVendorName", "sdn") == NULL)
	{
		printf("Could not create JSON object: nfVendorName\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(commonEventHeader, "timeZoneOffset", "+00:00") == NULL)
	{
		printf("Could not create JSON object: timeZoneOffset\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(commonEventHeader, "version", "4.0.1") == NULL)
	{
		printf("Could not create JSON object: version\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(commonEventHeader, "vesEventListenerVersion", "7.0.1") == NULL)
	{
		printf("Could not create JSON object: vesEventListenerVersion\n");
		return NULL;
	}

	return commonEventHeader;
}

cJSON*	vesCreateHeartbeatFields(int heartbeat_interval)
{
	char dateAndTime[50];
	getCurrentDateAndTime(dateAndTime);

	cJSON *heartbeatFields = cJSON_CreateObject();
	if (heartbeatFields == NULL)
	{
		printf("Could not create JSON object: heartbeatFields\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(heartbeatFields, "heartbeatFieldsVersion", "3.0") == NULL)
	{
		printf("Could not create JSON object: heartbeatFieldsVersion\n");
		return NULL;
	}

	if (cJSON_AddNumberToObject(heartbeatFields, "heartbeatInterval", (double)(heartbeat_interval)) == NULL)
	{
		printf("Could not create JSON object: heartbeatInterval\n");
		return NULL;
	}

	cJSON *additionalFields = cJSON_CreateObject();
	if (additionalFields == NULL)
	{
		printf("Could not create JSON object: additionalFields\n");
		return NULL;
	}
	cJSON_AddItemToObject(heartbeatFields, "additionalFields", additionalFields);

	if (cJSON_AddStringToObject(additionalFields, "eventTime", dateAndTime) == NULL)
	{
		printf("Could not create JSON object: eventTime\n");
		return NULL;
	}

	return heartbeatFields;
}

char* 	readConfigFileInString(void)
{
	char * buffer = 0;
	long length;
	char config_file[200];
	sprintf(config_file, "%s/configuration.json", getenv("SCRIPTS_DIR"));
	FILE * f = fopen (config_file, "rb");

	if (f)
	{
	  fseek (f, 0, SEEK_END);
	  length = ftell (f);
	  fseek (f, 0, SEEK_SET);
	  buffer = malloc (length + 1);
	  if (buffer)
	  {
	    fread (buffer, 1, length, f);
	  }
	  fclose (f);
	  buffer[length] = '\0';
	}

	if (buffer)
	{
	  return buffer;
	}

	return NULL;
}

void 	writeConfigFile(char *config)
{
	char * buffer = 0;
	long length;
	char config_file[200];
	sprintf(config_file, "%s/configuration.json", getenv("SCRIPTS_DIR"));
	FILE * f = fopen (config_file, "w");

	if (f)
	{
		fputs(config, f);
		fclose(f);
	}
	else
	{
		printf("Could not write configuration file");
	}
}

int 	getFaultNotificationDelayPeriodFromConfigJson(void)
{
	char *stringConfig = readConfigFileInString();
	int notificationDelay = 0;

	if (stringConfig == NULL)
	{
		printf("Could not read JSON configuration file in string.");
		return 0;
	}

	cJSON *jsonConfig = cJSON_Parse(stringConfig);
	if (jsonConfig == NULL)
	{
		free(stringConfig);
		const char *error_ptr = cJSON_GetErrorPtr();
		if (error_ptr != NULL)
		{
			fprintf(stderr, "Could not parse JSON configuration! Error before: %s\n", error_ptr);
		}
		return SR_ERR_OPERATION_FAILED;
	}
	//we don't need the string anymore
	free(stringConfig);

	cJSON *notifConfig = cJSON_GetObjectItemCaseSensitive(jsonConfig, "notification-config");
	if (!cJSON_IsObject(notifConfig))
	{
		printf("Configuration JSON is not as expected: notification-config is not an object");
		free(jsonConfig);
		return SR_ERR_OPERATION_FAILED;
	}

	cJSON *faultNotifDelay = cJSON_GetObjectItemCaseSensitive(notifConfig, "fault-notification-delay-period");
	if (!cJSON_IsNumber(faultNotifDelay))
	{
		printf("Configuration JSON is not as expected: fault-notification-delay-period is not a number");
		free(jsonConfig);
		return SR_ERR_OPERATION_FAILED;
	}

	notificationDelay = (int)(faultNotifDelay->valuedouble);

	free(jsonConfig);

	return notificationDelay;
}

int 	getVesHeartbeatPeriodFromConfigJson(void)
{
	char *stringConfig = readConfigFileInString();
	int vesHeartbeat = 0;

	if (stringConfig == NULL)
	{
		printf("Could not read JSON configuration file in string.");
		return 0;
	}

	cJSON *jsonConfig = cJSON_Parse(stringConfig);
	if (jsonConfig == NULL)
	{
		free(stringConfig);
		const char *error_ptr = cJSON_GetErrorPtr();
		if (error_ptr != NULL)
		{
			fprintf(stderr, "Could not parse JSON configuration! Error before: %s\n", error_ptr);
		}
		return SR_ERR_OPERATION_FAILED;
	}
	//we don't need the string anymore
	free(stringConfig);

	cJSON *notifConfig = cJSON_GetObjectItemCaseSensitive(jsonConfig, "notification-config");
	if (!cJSON_IsObject(notifConfig))
	{
		printf("Configuration JSON is not as expected: notification-config is not an object");
		free(jsonConfig);
		return SR_ERR_OPERATION_FAILED;
	}

	cJSON *vesHeartbeatPeriod = cJSON_GetObjectItemCaseSensitive(notifConfig, "ves-heartbeat-period");
	if (!cJSON_IsNumber(vesHeartbeatPeriod))
	{
		printf("Configuration JSON is not as expected: ves-heartbeat-period is not a number");
		free(jsonConfig);
		return SR_ERR_OPERATION_FAILED;
	}

	vesHeartbeat = (int)(vesHeartbeatPeriod->valuedouble);

	free(jsonConfig);

	return vesHeartbeat;
}


/*
 * Dynamically allocated memory;
 * Caller needs to free the memory after it uses the value.
 *
*/
char* 	getVesAuthMethodFromConfigJson(void)
{
	char *stringConfig = readConfigFileInString();

	if (stringConfig == NULL)
	{
		printf("Could not read JSON configuration file in string.");
		return 0;
	}

	cJSON *jsonConfig = cJSON_Parse(stringConfig);
	if (jsonConfig == NULL)
	{
		free(stringConfig);
		const char *error_ptr = cJSON_GetErrorPtr();
		if (error_ptr != NULL)
		{
			fprintf(stderr, "Could not parse JSON configuration! Error before: %s\n", error_ptr);
		}
		return SR_ERR_OPERATION_FAILED;
	}
	//we don't need the string anymore
	free(stringConfig);

	cJSON *vesDetails = cJSON_GetObjectItemCaseSensitive(jsonConfig, "ves-endpoint-details");
	if (!cJSON_IsObject(vesDetails))
	{
		printf("Configuration JSON is not as expected: ves-endpoint-details is not an object");
		free(jsonConfig);
		return SR_ERR_OPERATION_FAILED;
	}

	cJSON *vesAuthMethod = cJSON_GetObjectItemCaseSensitive(vesDetails, "ves-endpoint-auth-method");
	if (!cJSON_IsString(vesAuthMethod))
	{
		printf("Configuration JSON is not as expected: ves-endpoint-auth-method is not an object");
		free(jsonConfig);
		return SR_ERR_OPERATION_FAILED;
	}

	char *auth_method_string = strdup(cJSON_GetStringValue(vesAuthMethod));

	free(jsonConfig);

	return auth_method_string;
}

/*
 * Dynamically allocated memory;
 * Caller needs to free the memory after it uses the value.
 *
*/
char* 	getVesIpFromConfigJson(void)
{
	char *stringConfig = readConfigFileInString();

	if (stringConfig == NULL)
	{
		printf("Could not read JSON configuration file in string.");
		return 0;
	}

	cJSON *jsonConfig = cJSON_Parse(stringConfig);
	if (jsonConfig == NULL)
	{
		free(stringConfig);
		const char *error_ptr = cJSON_GetErrorPtr();
		if (error_ptr != NULL)
		{
			fprintf(stderr, "Could not parse JSON configuration! Error before: %s\n", error_ptr);
		}
		return SR_ERR_OPERATION_FAILED;
	}
	//we don't need the string anymore
	free(stringConfig);

	cJSON *vesDetails = cJSON_GetObjectItemCaseSensitive(jsonConfig, "ves-endpoint-details");
	if (!cJSON_IsObject(vesDetails))
	{
		printf("Configuration JSON is not as expected: ves-endpoint-details is not an object");
		free(jsonConfig);
		return SR_ERR_OPERATION_FAILED;
	}

	cJSON *vesIp = cJSON_GetObjectItemCaseSensitive(vesDetails, "ves-endpoint-ip");
	if (!cJSON_IsString(vesIp))
	{
		printf("Configuration JSON is not as expected: ves-endpoint-ip is not an object");
		free(jsonConfig);
		return SR_ERR_OPERATION_FAILED;
	}

	char *ves_ip = strdup(cJSON_GetStringValue(vesIp));

	free(jsonConfig);

	return ves_ip;
}

int 	getVesPortFromConfigJson(void)
{
	char *stringConfig = readConfigFileInString();

	if (stringConfig == NULL)
	{
		printf("Could not read JSON configuration file in string.");
		return 0;
	}

	cJSON *jsonConfig = cJSON_Parse(stringConfig);
	if (jsonConfig == NULL)
	{
		free(stringConfig);
		const char *error_ptr = cJSON_GetErrorPtr();
		if (error_ptr != NULL)
		{
			fprintf(stderr, "Could not parse JSON configuration! Error before: %s\n", error_ptr);
		}
		return SR_ERR_OPERATION_FAILED;
	}
	//we don't need the string anymore
	free(stringConfig);

	cJSON *vesDetails = cJSON_GetObjectItemCaseSensitive(jsonConfig, "ves-endpoint-details");
	if (!cJSON_IsObject(vesDetails))
	{
		printf("Configuration JSON is not as expected: ves-endpoint-details is not an object");
		free(jsonConfig);
		return SR_ERR_OPERATION_FAILED;
	}

	cJSON *vesPort = cJSON_GetObjectItemCaseSensitive(vesDetails, "ves-endpoint-port");
	if (!cJSON_IsNumber(vesPort))
	{
		printf("Configuration JSON is not as expected: ves-endpoint-port is not an object");
		free(jsonConfig);
		return SR_ERR_OPERATION_FAILED;
	}

	int port = (int)(vesPort->valuedouble);

	free(jsonConfig);

	return port;
}

int 	getVesRegistrationFromConfigJson(void)
{
	char *stringConfig = readConfigFileInString();

	if (stringConfig == NULL)
	{
		printf("Could not read JSON configuration file in string.");
		return 0;
	}

	cJSON *jsonConfig = cJSON_Parse(stringConfig);
	if (jsonConfig == NULL)
	{
		free(stringConfig);
		const char *error_ptr = cJSON_GetErrorPtr();
		if (error_ptr != NULL)
		{
			fprintf(stderr, "Could not parse JSON configuration! Error before: %s\n", error_ptr);
		}
		return SR_ERR_OPERATION_FAILED;
	}
	//we don't need the string anymore
	free(stringConfig);

	cJSON *vesDetails = cJSON_GetObjectItemCaseSensitive(jsonConfig, "ves-endpoint-details");
	if (!cJSON_IsObject(vesDetails))
	{
		printf("Configuration JSON is not as expected: ves-endpoint-details is not an object");
		free(jsonConfig);
		return SR_ERR_OPERATION_FAILED;
	}

	cJSON *vesReg = cJSON_GetObjectItemCaseSensitive(vesDetails, "ves-registration");
	if (!cJSON_IsBool(vesReg))
	{
		printf("Configuration JSON is not as expected: ves-registration is not an object");
		free(jsonConfig);
		return SR_ERR_OPERATION_FAILED;
	}

	int is_ves_reg = (cJSON_IsTrue(vesReg)) ? TRUE : FALSE;

	free(jsonConfig);

	return is_ves_reg;
}

cJSON*	vesCreatePnfRegistrationFields(int port, bool is_tls)
{
	cJSON *pnfRegistrationFields = cJSON_CreateObject();
	if (pnfRegistrationFields == NULL)
	{
		printf("Could not create JSON object: pnfRegistrationFields\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(pnfRegistrationFields, "pnfRegistrationFieldsVersion", "2.0") == NULL)
	{
		printf("Could not create JSON object: pnfRegistrationFieldsVersion\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(pnfRegistrationFields, "lastServiceDate", "2019-08-16") == NULL)
	{
		printf("Could not create JSON object: lastServiceDate\n");
		return NULL;
	}

	char mac_addr[40];
	generateRandomMacAddress(mac_addr);

	if (cJSON_AddStringToObject(pnfRegistrationFields, "macAddress", mac_addr) == NULL)
	{
		printf("Could not create JSON object: macAddress\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(pnfRegistrationFields, "manufactureDate", "2019-08-16") == NULL)
	{
		printf("Could not create JSON object: manufactureDate\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(pnfRegistrationFields, "modelNumber", "Simulated Device Melacon") == NULL)
	{
		printf("Could not create JSON object: manufactureDate\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(pnfRegistrationFields, "oamV4IpAddress", getenv("NTS_IP")) == NULL)
	{
		printf("Could not create JSON object: oamV4IpAddress\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(pnfRegistrationFields, "oamV6IpAddress", "0:0:0:0:0:ffff:a0a:011") == NULL)
	{
		printf("Could not create JSON object: oamV6IpAddress\n");
		return NULL;
	}

	char serial_number[100];
	sprintf(serial_number, "%s-%s-%d-Simulated Device Melacon", getenv("HOSTNAME"), getenv("NTS_IP"), port);

	if (cJSON_AddStringToObject(pnfRegistrationFields, "serialNumber", serial_number) == NULL)
	{
		printf("Could not create JSON object: serialNumber\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(pnfRegistrationFields, "softwareVersion", "2.3.5") == NULL)
	{
		printf("Could not create JSON object: softwareVersion\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(pnfRegistrationFields, "unitFamily", "Simulated Device") == NULL)
	{
		printf("Could not create JSON object: unitFamily\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(pnfRegistrationFields, "unitType", "O-RAN-sim") == NULL)
	{
		printf("Could not create JSON object: unitType\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(pnfRegistrationFields, "vendorName", "Melacon") == NULL)
	{
		printf("Could not create JSON object: vendorName\n");
		return NULL;
	}

	cJSON *additionalFields = cJSON_CreateObject();
	if (additionalFields == NULL)
	{
		printf("Could not create JSON object: additionalFields\n");
		return NULL;
	}
	cJSON_AddItemToObject(pnfRegistrationFields, "additionalFields", additionalFields);

	char portString[10];
	sprintf(portString, "%d", port);

	if (cJSON_AddStringToObject(additionalFields, "oamPort", portString) == NULL)
	{
		printf("Could not create JSON object: oamPort\n");
		return NULL;
	}

	if (is_tls)
	{
		//TLS specific configuration
		if (cJSON_AddStringToObject(additionalFields, "protocol", "TLS") == NULL)
		{
			printf("Could not create JSON object: protocol\n");
			return NULL;
		}

		//TODO here we have the username from the docker container hardcoded: netconf
		if (cJSON_AddStringToObject(additionalFields, "username", "netconf") == NULL)
		{
			printf("Could not create JSON object: username\n");
			return NULL;
		}

		if (cJSON_AddStringToObject(additionalFields, "keyId", "device-key") == NULL)
		{
			printf("Could not create JSON object: keyId\n");
			return NULL;
		}
	}
	else
	{
		//SSH specific configuration
		if (cJSON_AddStringToObject(additionalFields, "protocol", "SSH") == NULL)
		{
			printf("Could not create JSON object: protocol\n");
			return NULL;
		}

		//TODO here we have the username from the docker container hardcoded: netconf
		if (cJSON_AddStringToObject(additionalFields, "username", "netconf") == NULL)
		{
			printf("Could not create JSON object: username\n");
			return NULL;
		}

		//TODO here we have the password from the docker container hardcoded: netconf
		if (cJSON_AddStringToObject(additionalFields, "password", "netconf") == NULL)
		{
			printf("Could not create JSON object: password\n");
			return NULL;
		}
	}

	if (cJSON_AddStringToObject(additionalFields, "reconnectOnChangedSchema", "false") == NULL)
	{
		printf("Could not create JSON object: reconnectOnChangedSchema\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(additionalFields, "sleep-factor", "1.5") == NULL)
	{
		printf("Could not create JSON object: sleep-factor\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(additionalFields, "tcpOnly", "false") == NULL)
	{
		printf("Could not create JSON object: tcpOnly\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(additionalFields, "connectionTimeout", "20000") == NULL)
	{
		printf("Could not create JSON object: connectionTimeout\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(additionalFields, "maxConnectionAttempts", "100") == NULL)
	{
		printf("Could not create JSON object: maxConnectionAttempts\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(additionalFields, "betweenAttemptsTimeout", "2000") == NULL)
	{
		printf("Could not create JSON object: betweenAttemptsTimeout\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(additionalFields, "keepaliveDelay", "120") == NULL)
	{
		printf("Could not create JSON object: keepaliveDelay\n");
		return NULL;
	}

	return pnfRegistrationFields;
}

int 	getNetconfAvailableFromConfigJson(void)
{
	char *stringConfig = readConfigFileInString();

	if (stringConfig == NULL)
	{
		printf("Could not read JSON configuration file in string.");
		return 0;
	}

	cJSON *jsonConfig = cJSON_Parse(stringConfig);
	if (jsonConfig == NULL)
	{
		free(stringConfig);
		const char *error_ptr = cJSON_GetErrorPtr();
		if (error_ptr != NULL)
		{
			fprintf(stderr, "Could not parse JSON configuration! Error before: %s\n", error_ptr);
		}
		return SR_ERR_OPERATION_FAILED;
	}
	//we don't need the string anymore
	free(stringConfig);

	cJSON *notifDetails = cJSON_GetObjectItemCaseSensitive(jsonConfig, "notification-config");
	if (!cJSON_IsObject(notifDetails))
	{
		printf("Configuration JSON is not as expected: notification-config is not an object");
		free(jsonConfig);
		return SR_ERR_OPERATION_FAILED;
	}

	cJSON *isNetconfAvailable = cJSON_GetObjectItemCaseSensitive(notifDetails, "is-netconf-available");
	if (!cJSON_IsBool(isNetconfAvailable))
	{
		printf("Configuration JSON is not as expected: is-netconf-available is not an object");
		free(jsonConfig);
		return SR_ERR_OPERATION_FAILED;
	}

	int is_netconf_available = (cJSON_IsTrue(isNetconfAvailable)) ? TRUE : FALSE;

	free(jsonConfig);

	return is_netconf_available;
}

int 	getVesAvailableFromConfigJson(void)
{
	char *stringConfig = readConfigFileInString();

	if (stringConfig == NULL)
	{
		printf("Could not read JSON configuration file in string.");
		return 0;
	}

	cJSON *jsonConfig = cJSON_Parse(stringConfig);
	if (jsonConfig == NULL)
	{
		free(stringConfig);
		const char *error_ptr = cJSON_GetErrorPtr();
		if (error_ptr != NULL)
		{
			fprintf(stderr, "Could not parse JSON configuration! Error before: %s\n", error_ptr);
		}
		return SR_ERR_OPERATION_FAILED;
	}
	//we don't need the string anymore
	free(stringConfig);

	cJSON *notifDetails = cJSON_GetObjectItemCaseSensitive(jsonConfig, "notification-config");
	if (!cJSON_IsObject(notifDetails))
	{
		printf("Configuration JSON is not as expected: notification-config is not an object");
		free(jsonConfig);
		return SR_ERR_OPERATION_FAILED;
	}

	cJSON *isVesAvailable = cJSON_GetObjectItemCaseSensitive(notifDetails, "is-ves-available");
	if (!cJSON_IsBool(isVesAvailable))
	{
		printf("Configuration JSON is not as expected: is-ves-available is not an object");
		free(jsonConfig);
		return SR_ERR_OPERATION_FAILED;
	}

	int is_netconf_available = (cJSON_IsTrue(isVesAvailable)) ? TRUE : FALSE;

	free(jsonConfig);

	return is_netconf_available;
}

cJSON*	vesCreateFaultFields(char *alarm_condition, char *alarm_object, char *severity, char *date_time, char *specific_problem)
{
	cJSON *faultFields = cJSON_CreateObject();
	if (faultFields == NULL)
	{
		printf("Could not create JSON object: faultFields\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(faultFields, "faultFieldsVersion", "4.0") == NULL)
	{
		printf("Could not create JSON object: faultFieldsVersion\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(faultFields, "alarmCondition", alarm_condition) == NULL)
	{
		printf("Could not create JSON object: alarmCondition\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(faultFields, "alarmInterfaceA", alarm_object) == NULL)
	{
		printf("Could not create JSON object: alarmInterfaceA\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(faultFields, "eventSourceType", "O_RAN_COMPONENT") == NULL)
	{
		printf("Could not create JSON object: eventSourceType\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(faultFields, "specificProblem", specific_problem) == NULL)
	{
		printf("Could not create JSON object: specificProblem\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(faultFields, "eventSeverity", severity) == NULL)
	{
		printf("Could not create JSON object: eventSeverity\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(faultFields, "vfStatus", "Active") == NULL)
	{
		printf("Could not create JSON object: vfStatus\n");
		return NULL;
	}

	cJSON *alarmAdditionalInformation = cJSON_CreateObject();
	if (alarmAdditionalInformation == NULL)
	{
		printf("Could not create JSON object: alarmAdditionalInformation\n");
		return NULL;
	}
	cJSON_AddItemToObject(faultFields, "alarmAdditionalInformation", alarmAdditionalInformation);

	if (cJSON_AddStringToObject(alarmAdditionalInformation, "eventTime", date_time) == NULL)
	{
		printf("Could not create JSON object: eventTime\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(alarmAdditionalInformation, "equipType", "O-RAN-sim") == NULL)
	{
		printf("Could not create JSON object: equipType\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(alarmAdditionalInformation, "vendor", "Melacon") == NULL)
	{
		printf("Could not create JSON object: vendor\n");
		return NULL;
	}

	if (cJSON_AddStringToObject(alarmAdditionalInformation, "model", "Simulated Device") == NULL)
	{
		printf("Could not create JSON object: model\n");
		return NULL;
	}

	return faultFields;
}